.user_tags {
  display: inline-block;
  border: 1px solid #999;
  color: #999;
  padding: 2px 6px;
  border-radius: 3px;
  cursor: pointer;
  line-height: 16px;
  i {
    display: none;
    color: #999;
    animation: rotation 1s linear infinite;
    transform-origin: center center;
  }
  &.loading {
    i {
      display: inline-block;
      height: 14px;
      width: 14px;
      line-height: 14px;
      text-align: center;
      font-size: 12px;
      vertical-align: top;
    }
  }
  &.active {
    background: #999;
    color: #fff;
    i {
      color: #fff;
    }
  }
}

@keyframes rotation {
  from {
    transform: rotate(0deg);
  }
  50% {
    transform: rotate(180deg);
  }
  to {
    transform: rotate(360deg);
  }
}